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In response to a request from the owner, an investigation was undertaken of possible hazardous working conditions at the Sims Radiator Shop (SIC-3714), Conyers, Georgia. The shop employed three workers, two of whom were mechanics, involved in the cleaning and repairing of automobile and truck radiators. The 8 hour time weighted average lead (7439921) concentrations for the two mechanics were 80 and 60 micrograms per cubic meter (microg/m3), both above the OSHA permissible exposure limit of 50microg/m3. The blood lead levels of the two mechanics were 30 and 37 micrograms per deciliter (microg/dl), both of which were below the 40microg/dl level which requires mandatory testing every 2 months. None of the employees had elevated free erythrocyte protoporphyrin concentrations or any physical symptoms suggestive of lead intoxication. The authors conclude that a potential health hazard existed from overexposures to lead. The authors recommend that activities required by the OSHA lead standard should be carried out to assist in eliminating this hazard. Local exhaust ventilation should be installed at the source of lead fume generation.